Castor

A companion novel to California. When Mina Maddox is forced by her stepbrother to start attending a boarding school for girls her senior year of high school, she is not happy. She ends up homesick, lonely, and mostly friendless. But then she meets one of the guards at her school. His name is Castor, and he's dark, mysterious, and stony, but Mina is drawn to him. He becomes her only friend. But things are complicated. Castor is alarmingly sad, and Mina doesn't know why. He has secrets and burdens he won't share with her, but she won't give up on him, and it's clear to everyone that this could end very badly.